CN107632435B

CN107632435B - Display panel, display device and pressure detection method of display panel

Info

Publication number: CN107632435B
Application number: CN201710896316.7A
Authority: CN
Inventors: 黄懿兵; 彭超; 康佳琪; 朴哲; 邱英彰; 沈柏平
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2017-09-28
Filing date: 2017-09-28
Publication date: 2020-06-30
Anticipated expiration: 2037-09-28
Also published as: CN107632435A

Abstract

The invention provides a display panel, a display device and a pressure detection method of the display panel, and relates to the technical field of display, wherein the display panel comprises: the display device comprises a first substrate, a second substrate and frame sealing glue; the pressure sensor comprises a first pressure sensor and a second pressure sensor which are identical in structure, the first pressure sensor is positioned on one side of the frame sealing glue close to the display area, and the second pressure sensor is covered by the frame sealing glue; at least one first pressure sensor and one second pressure sensor form a first pressure sensor group, and the output signal of the second pressure sensor is used as the reference signal of the output signal of any one first pressure sensor; and/or at least one first pressure sensor and a plurality of second pressure sensors form a second pressure sensor group, and the average value of output signals of all the second pressure sensors is used as a reference signal of the output signal of any one first pressure sensor. The invention improves the accuracy of the detection result of the pressure sensor.

Description

Display panel, display device and pressure detection method of display panel

Technical Field

The invention relates to the technical field of display, in particular to a display panel, a display device and a pressure detection method of the display panel.

Background

At present, a display panel with a touch function is widely applied to various display products such as mobile phones, tablet computers, information query machines in public halls and the like as an information input tool. Therefore, the user can operate the electronic equipment by only touching the mark on the display panel with fingers, dependence of the user on other equipment (such as a keyboard, a mouse and the like) is eliminated, and man-machine interaction is simpler.

In order to better meet the requirements of users, a pressure sensor for detecting the magnitude of a touch pressure value when a user touches a display panel is usually arranged in the display panel, so that the display panel can not only collect touch position information, but also collect the magnitude of the touch pressure value, and the application range of the touch display technology is expanded.

In the existing design, the pressure sensor is generally formed into a wheatstone bridge, and the output signal value of the wheatstone bridge is related to the magnitude of the deformation quantity generated when the display panel is subjected to the pressure, and the output signal value of the wheatstone bridge is also influenced by the ambient temperature, so the temperature influences the accuracy of the detection result of the pressure sensor.

Disclosure of Invention

The invention provides a display panel, a display device and a pressure detection method of the display panel, which aim to reduce the influence of temperature on a pressure sensor and improve the accuracy of a detection result of the pressure sensor.

In a first aspect, an embodiment of the present invention provides a display panel, including a display area and a non-display area surrounding the display area, where the display panel includes:

a first substrate;

a second substrate disposed opposite to the first substrate;

the frame sealing glue is positioned between the first substrate and the second substrate and positioned in the non-display area;

a pressure sensor located on a side of the first substrate facing the second substrate;

the pressure sensors comprise a first pressure sensor and a second pressure sensor which are identical in structure, the first pressure sensor is positioned on one side, close to the display area, of the frame sealing glue, and the second pressure sensor is covered by the frame sealing glue; wherein,

at least one first pressure sensor and one second pressure sensor form a first pressure sensor group, and in the same first pressure sensor group, the output signal of the second pressure sensor is used as the reference signal of the output signal of any first pressure sensor; and/or the presence of a gas in the gas,

at least one first pressure sensor and a plurality of second pressure sensors form a second pressure sensor group, and in the same second pressure sensor group, the average value of output signals of all the second pressure sensors is used as a reference signal of any one output signal of the first pressure sensor.

In a second aspect, an embodiment of the present invention provides a display device, including the display panel described in the first aspect.

In a third aspect, an embodiment of the present invention provides a pressure detection method for a display panel, where the display panel includes a display area and a non-display area surrounding the display area, and the display panel includes:

a first substrate;

a second substrate disposed opposite to the first substrate;

at least one first pressure sensor and a plurality of second pressure sensors form a second pressure sensor group, and in the same second pressure sensor group, the average value of output signals of all the second pressure sensors is used as a reference signal of the output signal of any one first pressure sensor;

the pressure detection method comprises the following steps:

in the first pressure sensor group, taking an output signal of the second pressure sensor as a first reference signal, and processing the output signal of the first pressure sensor and the first reference signal to obtain a pressure detection signal value of the first pressure sensor; and/or the presence of a gas in the gas,

in the second pressure sensor group, the average value of all the output signals of the second pressure sensors is used as a second reference signal, and the output signal of the first pressure sensor and the second reference signal are processed to obtain the pressure detection signal value of the first pressure sensor.

The display panel provided by the invention comprises a first substrate, a second substrate, frame sealing glue positioned between the first substrate and the second substrate, a first pressure sensor and a second pressure sensor which have the same structure, wherein the first pressure sensor is positioned on one side of the frame sealing glue close to a display area and is used for carrying out pressure detection according to the deformation quantity generated when the display panel is subjected to pressure, and meanwhile, the output signal of the first pressure sensor is also influenced by temperature; the second pressure sensor is covered by the frame sealing glue, so that the deformation of the display panel can not cause the deformation of the second pressure sensor or the deformation caused by the deformation can be ignored, and the output signal of the second pressure sensor can be regarded as not being influenced by the external pressure and only influenced by the temperature. At least one first pressure sensor and one second pressure sensor form a first pressure sensor group, and in the same first pressure sensor group, the output signal of the second pressure sensor is used as the reference signal of the output signal of any one first pressure sensor; the display panel provided by the invention comprises the first pressure sensor group and/or the second pressure sensor group, and in the first pressure sensor group and the second pressure sensor group, the output signal of any one first pressure sensor has the corresponding second pressure sensor to provide the reference signal for the output signal of the first pressure sensor, so that the influence of temperature on the first pressure sensor is reduced, and the accuracy of the detection result of the first pressure sensor is improved, namely the accuracy of the detection result of the pressure sensor is improved.

Drawings

Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view along the direction AA' in FIG. 1;

fig. 3 is a schematic top view of another display panel according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view taken along the direction BB' in FIG. 3;

fig. 5 is a schematic top view of another display panel according to an embodiment of the present invention;

fig. 6 is a schematic top view of another display panel according to an embodiment of the present invention;

fig. 7 is a schematic top view of another display panel according to an embodiment of the present invention;

fig. 8 is a schematic top view of another display panel according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first pressure sensor and a second pressure sensor according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of another first pressure sensor and a second pressure sensor provided in the embodiment of the present invention;

fig. 11 is a schematic circuit diagram of a first pressure sensor and a second pressure sensor according to an embodiment of the present invention;

fig. 12 is a schematic circuit diagram of another first pressure sensor and a second pressure sensor according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the invention;

fig. 14 is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention, fig. 2 is a schematic cross-sectional view along an AA' direction in fig. 1, and with reference to fig. 1 and fig. 2, the display panel includes a display area 101 and a non-display area 102 surrounding the display area 101, and the display panel includes: the display device comprises a first substrate 10, a second substrate 20, frame sealing glue 30 and a pressure sensor 40. The second substrate 20 is disposed opposite to the first substrate 10. The frame sealing adhesive 30 is located between the first substrate 10 and the second substrate 20, and the frame sealing adhesive 30 is located in the non-display region 102. The pressure sensor 40 is located on a side of the first substrate 10 facing the second substrate 20, the pressure sensor 40 includes a first pressure sensor 41 and a second pressure sensor 42 with the same structure, that is, the first pressure sensor 41 and the second pressure sensor 42 are made of the same material and process flow, and the first pressure sensor 41 and the second pressure sensor 42 have the same circuit structure and physical structure. The first pressure sensor 41 is located on one side of the frame sealing adhesive 30 close to the display region 101, and the second pressure sensor 42 is covered by the frame sealing adhesive 30. The first pressure sensor 41 shown in fig. 1 and fig. 2 does not overlap with the frame sealing adhesive 30, and in other embodiments, the first pressure sensor 41 may be partially overlapped with the frame sealing adhesive 30, as long as the first pressure sensor 41 is not completely covered by the frame sealing adhesive 30. In which at least one first pressure sensor 41 and one second pressure sensor 42 form a first pressure sensor group 401, fig. 1 only exemplarily shows that the display panel includes 3 first pressure sensor groups 401, and each of the 3 first pressure sensor groups 401 includes 1, 2, and 3 first pressure sensors 41, and the implementation of the present invention is not limited to the number of the first pressure sensor groups 401 included in the display panel and the number of the first pressure sensors 41 included in each first pressure sensor group 401. In the same first pressure sensor group 401, the output signal of the second pressure sensor 42 serves as a reference signal for the output signal of any one of the first pressure sensors 41, that is, in the same first pressure sensor group 401, the plurality of first pressure sensors 41 share the same second pressure sensor 42 to provide the reference signal for the same second pressure sensor 42.

Fig. 3 is a schematic top view structure diagram of another display panel according to an embodiment of the present invention, fig. 4 is a schematic cross-sectional structure diagram along a direction BB' in fig. 3, and with reference to fig. 3 and fig. 4, at least one first pressure sensor 41 and a plurality of second pressure sensors 42 form a second pressure sensor group 402, fig. 3 only exemplarily shows that the display panel includes 3 second pressure sensor groups 402, and each of the 3 second pressure sensor groups 402 includes 2 second pressure sensors 42, and the implementation of the present invention does not limit the number of the second pressure sensor groups 402 included in the display panel and the number of the second pressure sensors 42 included in each second pressure sensor group 402. In the same second pressure sensor group 402, the average value of the output signals of all the second pressure sensors 42 serves as the reference signal of the output signal of any one of the first pressure sensors 41, that is, in the same second pressure sensor group 402, all the first pressure sensors 41 share the same plurality of second pressure sensors 42 to provide the reference signal thereto, and the average value of the output signals of all the second pressure sensors 42 serves as the reference signal.

On the one hand, one first pressure sensor 41 in the first pressure sensor group 401 only needs one second pressure sensor 42 to provide a reference signal for it, and one first pressure sensor 41 in the second pressure sensor group 402 needs a plurality (2 are exemplarily set in fig. 3) of second pressure sensors 42 to provide a reference signal for it, so that fewer second pressure sensors 42 can be provided for the first pressure sensor group 401 relative to the second pressure sensor group 402, which is beneficial to reduce the cost; on the other hand, if the first pressure sensor group 401 and the second pressure sensor group 402 are within the same size of an area, the second pressure sensor group 402 includes a plurality of second pressure sensors 42, the plurality of second pressure sensors 42 are located at different positions and are affected by different temperatures, and the average value of the output signals of the plurality of second pressure sensors 42 is used as a reference signal, so that the influence of the temperature in the area on the first pressure sensor 41 is reflected better than that of only one second pressure sensor 42, and a more accurate reference signal can be provided for the first pressure sensor 41 within the area.

Fig. 5 is a schematic top view of another display panel according to an embodiment of the present invention, and as shown in fig. 5, the display panel includes both a first pressure sensor group 401 and a second pressure sensor group 402. The embodiment of the present invention does not limit the positions and the numbers of the first pressure sensor group and the second pressure sensor group.

The display panel provided by the embodiment of the invention comprises a first substrate, a second substrate, frame sealing glue positioned between the first substrate and the second substrate, a first pressure sensor and a second pressure sensor which have the same structure, wherein the first pressure sensor is positioned on one side of the frame sealing glue close to a display area and is used for carrying out pressure detection according to the deformation quantity generated when the display panel is subjected to pressure, and meanwhile, the output signal of the first pressure sensor is influenced by temperature; the second pressure sensor is covered by the frame sealing glue, so that the deformation of the display panel can not cause the deformation of the second pressure sensor or the deformation caused by the deformation can be ignored, and the output signal of the second pressure sensor can be regarded as not being influenced by the external pressure and only influenced by the temperature. At least one first pressure sensor and one second pressure sensor form a first pressure sensor group, and in the same first pressure sensor group, the output signal of the second pressure sensor is used as the reference signal of the output signal of any one first pressure sensor; and/or at least one first pressure sensor and a plurality of second pressure sensors form a second pressure sensor group, and in the same second pressure sensor group, the average value of all output signals of the second pressure sensors is used as a reference signal of any output signal of the first pressure sensor.

In the first pressure sensor group, it is assumed that the temperature at the position of the first pressure sensor and the error value due to the temperature in the output signal of the first pressure sensor are the first temperature and the first error value, respectively, the temperature at the position of the second pressure sensor and the error value due to the temperature in the output signal of the second pressure sensor are the second temperature and the second error value, respectively, and since the first pressure sensor and the second pressure sensor have the same structure, the first error value and the first temperature and the second error value and the second temperature have the same first functional relationship.

Illustratively, the display panel includes a first pressure sensor group, an output signal of a second pressure sensor in the first pressure sensor group is only affected by temperature due to being covered by the sealant, an output signal of the second pressure sensor represents an influence of temperature at a position where the second pressure sensor is located on an output signal of the second pressure sensor, wherein, when the first temperature is the same as or very close to the second temperature, the output signal of the first pressure sensor and the output signal of the second pressure sensor are directly subtracted, that is, the output signal of the second pressure sensor is used as a reference signal of the first pressure sensor in the same group, and a pressure detection signal value of the first pressure sensor is obtained on the basis of reducing (even eliminating) the influence of temperature on the first pressure sensor and improving accuracy of a detection result of the first pressure sensor, when the difference between the first temperature and the second temperature is larger, the functional relationship between the first temperature and the second temperature is assumed to be the second functional relationship, and then after the conversion between the second functional relationship and the first functional relationship, a third functional relationship between the first error value and the second error value can be obtained, and based on the third functional relationship, the output signal of the second pressure sensor is taken as the reference signal, so that the pressure detection signal value of the first pressure sensor can be obtained on the basis of reducing (even eliminating) the influence of the temperature on the first pressure sensor and improving the accuracy of the detection result of the first pressure sensor.

Illustratively, the second pressure sensor group includes two second pressure sensors having second temperatures T1 and T2, respectively, and second error values F1 and F2 for the two second pressure sensors, respectively, T1 and F1 having a first functional relationship, and T2 and F2 having a first functional relationship. The display panel comprises a second pressure sensor group, the output signal of the second pressure sensor in the second pressure sensor group is only influenced by the temperature because the second pressure sensor is covered by the frame sealing glue, the output signal of the second pressure sensor represents the influence of the temperature at the position of the second pressure sensor on the output signal of the second pressure sensor, wherein when the first temperature is the same as or very close to T1 and T2, the output signal of the first pressure sensor can be directly subtracted from the average value of F1 and F2, namely (F1+ F2)/2, namely the average value of the output signals of all the second pressure sensors in the second pressure sensor group is used as the reference signal of the first pressure sensor in the same group, on the basis of reducing (even eliminating) the influence of the temperature on the first pressure sensor and improving the accuracy of the detection result of the first pressure sensor, the pressure detection signal value of the first pressure sensor is obtained, and when the first temperature is different from T1 and T2, assuming that the functional relationship between the first temperature and T1 and T2 is a fourth functional relationship, T1 and T2 and (F1+ F2)/2 have a fifth functional relationship, a sixth functional relationship between the first error value and (F1+ F2)/2 may be obtained after conversion through the above fourth functional relationship, the fifth functional relationship and the first functional relationship, and based on the sixth functional relation, taking the average value of the output signals of all the second pressure sensors in the second pressure sensor group as the reference signal, the pressure detection signal value of the first pressure sensor can be obtained on the basis of reducing (even eliminating) the influence of the temperature on the first pressure sensor and improving the accuracy of the detection result of the first pressure sensor.

It should be noted that, in order to enable the pressure sensor to sense the deformation of the display panel and implement pressure detection according to the deformation of the display panel, the frame sealing adhesive is not allowed to cover the pressure sensor in the prior art, that is, only the first pressure sensor is arranged and the second pressure sensor is not arranged in the prior art.

Alternatively, referring to fig. 1 and fig. 2, in the same first pressure sensor group 401, the size of the first pressure sensor 41 or the second pressure sensor 42 along the first direction is H, the first pressure sensor 41 has a first orthographic projection to the first substrate 10, the second pressure sensor 42 has a second orthographic projection to the first substrate 10, the farthest distance between any point on the first orthographic projection and any point on the second orthographic projection is H, and 2H ≦ 6H, and the first direction is the direction in which the first orthographic projection points to the second orthographic projection (i.e., the geometric centroid of the first orthographic projection points to the geometric centroid of the second orthographic projection), where the first pressure sensor 41 and the second pressure sensor 42 may be located on the same layer or on different layers, which is not limited by the present disclosure. In fig. 1, the pressure sensors 40 (including the first pressure sensor 41 and the second pressure sensor 42 having the same configuration) are arranged in the same layer and are illustrated as a square, a direction in which the center of the square first pressure sensor 41 is directed to the center of the square second pressure sensor 42 is a first direction, and the center of the square refers to an intersection of two diagonal lines of the square. When the farthest distance H between any point on the first orthographic projection and any point on the second orthographic projection satisfies 2H ≦ 6H, the second pressure sensor 42 in the same first pressure sensor group 401 is disposed near the first pressure sensor 41, and the first pressure sensor 41 and the second pressure sensor 42 have similar temperatures, so that the first pressure sensor 41 and the second pressure sensor 42 are affected by the temperatures to a similar extent, the second pressure sensor 42 in the first pressure sensor group 401 is covered by the sealant 30, and the output signal of the second pressure sensor 42 is affected by the temperatures, and the output signal of the second pressure sensor 42 represents the influence of the temperature at the position of the second pressure sensor 42 on the output signal of the second pressure sensor 42, because the first pressure sensor 41 and the second pressure sensor 42 have the same structure, the first pressure sensor 41 and the second pressure sensor 42 are affected by the temperatures to the same or similar extent, the output signal of the first pressure sensor 41 and the output signal of the second pressure sensor 42 may be directly subtracted from each other, that is, the output signal of the second pressure sensor 42 is used as the reference signal of the first pressure sensor 41 in the same group, so as to obtain the pressure detection signal value of the first pressure sensor 41 on the basis of reducing (even eliminating) the influence of the temperature on the first pressure sensor 41 and improving the accuracy of the detection result of the first pressure sensor 41.

Alternatively, referring to FIGS. 1 and 2, the first pressure sensor 41 or the second pressure sensor 42 has a dimension h in the first direction of 50 μm ≦ h ≦ 120 μm.

Specifically, when the setting h is selected to be smaller than 50 μm, the size of the pressure sensor (including the first pressure sensor 41 and the second pressure sensor 42 which are identically configured) is too small, increasing the difficulty of the process of manufacturing the pressure sensor, and the smaller the pressure sensor, the smaller the ability of the pressure sensor to sense pressure; when the setting h is larger than 120 μm, the size of the pressure sensor is too large, which results in the increase of the frame of the display panel, and is contrary to the design trend of the narrow frame, i.e. it is not favorable to realize the narrow frame, and the larger the pressure sensor is, the larger the required driving voltage is, and the power consumption of the display panel is increased. According to the technical scheme provided by the embodiment of the application, h is set to be more than or equal to 50 micrometers and less than or equal to 120 micrometers, so that the pressure sensor 40 can be ensured to have proper size and resistance value, higher pressure detection sensitivity is realized, and meanwhile, too much area of the non-display area 102 is not occupied, and the display effect of the display panel is not influenced.

Alternatively, referring to fig. 1, the display panel includes a first side 51, a second side 52, a third side 53 and a fourth side 54, the first side 51 has a length greater than the second side 52 and the fourth side 54, the third side 53 has a length greater than the second side 52 and the fourth side 54, and the first pressure sensor group 401 may be located on any one or more of the first side 51, the second side 53, the third side 53 and the fourth side 54. As shown in fig. 1, for example, the plurality of first pressure sensor groups 401 are respectively located on the first side 51, the third side 53 and the fourth side 54, in other embodiments, the plurality of first pressure sensor groups 401 may be simultaneously located on any other three sides of the first side 51, the second side 52, the third side 53 and the fourth side 54 of the display panel, or the plurality of first pressure sensor groups 401 may be simultaneously distributed on any one, two or four of the first side 51, the second side 52, the third side 53 and the fourth side 54, which is not limited in the embodiment of the present invention. It will be appreciated that, in general, the simultaneous placement of groups of pressure sensors on multiple sides of the display panel allows the deformation of the display panel to be more easily and accurately detected than if groups of pressure sensors were placed on only one side.

Alternatively, referring to fig. 2 and 4, the first pressure sensor 41 is disposed in the same layer as the second pressure sensor 42. The first pressure sensor 41 and the second pressure sensor 42 are arranged in the same layer, and compared with the situation that the first pressure sensor 41 and the second pressure sensor 42 are arranged in different layers, the temperature difference between the first pressure sensor 41 and the second pressure sensor 42 is smaller, and the first pressure sensor 41 and the second pressure sensor 42 are arranged in the same layer, the first pressure sensor 41 and the second pressure sensor 42 can be manufactured in the same process, so that the manufacturing process is simplified. It should be noted that the first pressure sensor and the second pressure sensor that are disposed in the same layer may be located in the first pressure sensor group or the second pressure sensor group, which is not limited in this embodiment of the present invention.

Alternatively, as shown in fig. 6, fig. 6 is a schematic top view structure diagram of another display panel according to an embodiment of the present invention, where each first pressure sensor group 401 includes only one first pressure sensor 401. According to the technical scheme provided by the embodiment of the invention, only one first pressure sensor is arranged on the second pressure sensor in the same pressure sensor group, so that the situation of signal interference possibly occurring among a plurality of first pressure sensors in the same pressure sensor group does not exist, and the accuracy of the detection result of the first pressure sensor is ensured and improved.

Alternatively, referring to fig. 6, in the first pressure sensor group 401, the second pressure sensor 42 points in the direction of the first pressure sensor 41, which coincides with the direction of the non-display area 102 pointing to the display area 101, i.e., the first pressure sensor 41 is disposed adjacent to the second pressure sensor 42, and the first pressure sensor 41 is located between the second pressure sensor 42 and the display area 101. In the technical solution provided by the embodiment of the present invention, the first pressure sensor 41 and the second pressure sensor 42 are disposed adjacent to each other, and the space occupied by the first pressure sensor 41 and the second pressure sensor 42 in the direction pointing to the non-display area along the display area is relatively small, and compared with a certain interval between the first pressure sensor 41 and the second pressure sensor 42 in the direction pointing to the non-display area along the display area, the display panel provided by the embodiment of the present invention may have a narrower bezel design.

Alternatively, as shown in fig. 7, fig. 7 is a schematic top view structure diagram of another display panel according to an embodiment of the present invention, each first pressure sensor group 401 includes a plurality of first pressure sensors 41, and in the same first pressure sensor group 401, a distance between each first pressure sensor 41 and each second pressure sensor 42 is equal.

Specifically, referring to fig. 7, each first pressure sensor group 401 may exemplarily include two first pressure sensors 41 and one second pressure sensor 42, the first pressure sensors 41 and the second pressure sensors 42 are disposed in the same layer, and the distance between each first pressure sensor 41 and the second pressure sensor 42 is equal in the same first pressure sensor group 401, for convenience of understanding, the two first pressure sensors 41 in the first pressure sensor group 401 are respectively denoted by different numbers "411" and "412", and the distance between the second pressure sensor 42 and the first pressure sensor 411 in the same first pressure sensor group 401 is equal to the distance between the second pressure sensor 42 and the second first pressure sensor 412. If the distance between the second pressure sensor 42 and the first pressure sensor 411 is relatively small, while the distance between the second pressure sensor 42 and the second first pressure sensor 412 is relatively large, the error of the second first pressure sensor 412 using the second pressure sensor 42 to provide a reference signal thereto will be relatively large, and the distances between the first pressure sensor 411 and the second first pressure sensor 412 and the second pressure sensor 42 are all set to be equal, the error comparison of the reference signals provided by the two first pressure sensors using the second pressure sensor can be equalized and controlled within a certain range so as to process the reference signals, and it can be understood that, in one first pressure sensor group, more than two first pressure sensors may also be included, and the first pressure sensors in the same first pressure sensor group are all disposed at equal intervals with the second pressure sensors.

Optionally, as shown in fig. 8, fig. 8 is a schematic top view structure diagram of another display panel provided in the embodiment of the present invention, where the display panel includes a first corner 61, a second corner 62, a third corner 63, and a fourth corner 64, where the first corner 61, the second corner 62, the third corner 63, and the fourth corner 64 respectively refer to four closed areas formed by intersection of an extension line of an inner edge of the frame sealing adhesive 30 close to the display area 101 and an outer edge of the non-display area 102 of the display panel, a first edge 51 of the display panel is between the first corner 61 and the second corner 62, a second edge 52 of the display panel is between the second corner 62 and the third corner 63, a third edge 53 of the display panel is between the third corner 63 and the fourth corner 64, and a fourth edge 54 of the display panel is between the fourth corner 64 and the first corner 61. The second pressure sensor group includes a plurality of first pressure sensors 41 and four second pressure sensors 42, the plurality of first pressure sensors 41 being located on any one or more of the first side 51, the second side 52, the third side 53 and the fourth side 54 of the display panel, respectively. As shown in fig. 8, for example, a plurality of first pressure sensors 41 are disposed on the first side 51 and the third side 53 of the display panel, respectively, in other embodiments, a plurality of first pressure sensors 41 may be disposed on any other two sides of the first side 51, the second side 52, the third side 53 and the fourth side 54 of the display panel, or on any one, three or four sides of the first side 51, the second side 52, the third side 53 and the fourth side 54 of the display panel, respectively, and the position of the first pressure sensor 41 may be specifically set according to product requirements. The four second pressure sensors 42 are located at the first corner 61, the second corner 62, the third corner 63 and the fourth corner 64, respectively, and are different from each other. In the display panel, if the driver IC is provided at the fourth side 54, generally, the temperature near the fourth side 54 is the highest in the entire display panel, and the temperature near the second side 52 is the lowest in the entire display panel, the temperature at the first corner 61 and the temperature at the fourth corner 64 are different, and the temperatures at the second corner 62 and the third corner 63 are different, wherein, although the temperature at the first corner 61 and the temperature at the second corner 62 are different to some extent, it is not particularly large, and the adverse effect of the temperature on the first pressure sensor 41 can be reduced to some extent by using the average value of the output signals of the second pressure sensor 42 at the four corners as the reference signal of the first pressure sensor 41. In the embodiment of the present invention, the average value of the output signals of the second pressure sensors 42 at the four corners is selected as the reference signal of any one of the first pressure sensors 41 in the whole display panel, so that the number of the second pressure sensors that need to be arranged on the display panel can be reduced to a great extent, and the cost can be saved.

Alternatively, as shown in fig. 8, a plurality of first pressure sensors 41 may be disposed at the first side 51 and the third side 53, respectively, that is, at the two long sides of the display panel, and a technician may dispose the driving circuit of the pressure sensor 40 and the signal processing circuit and driving IC of the pressure sensor 40, a flexible circuit board, and the like at the short side of the display panel (for example, the fourth side 54), so that there is not enough space at the short side of the display panel where the driving IC is disposed to accommodate the pressure sensor 40; on the other hand, if the pressure sensor 40 is provided at the other short side (for example, the second side 52) opposite to the driver IC, the flexible circuit board, or the like, it is necessary to provide a long connection line for connecting the pressure sensor 40 and the driver circuit of the pressure sensor 40 and the signal processing circuit of the pressure sensor 40, and the connection line needs to pass through the short sides (for example, the second side 52 and the fourth side 54) of the two display panels and the long side (for example, the first side 51 or the third side 53) of one display panel, and the wiring is complicated, so that it is possible to provide a plurality of pressure sensors 40 at the long sides of the display panel, that is, the first side 51 and the third side 53, to simplify the wiring on the basis of the narrow frame.

Optionally, as shown in fig. 9, fig. 9 is a schematic structural diagram of a first pressure sensor and a second pressure sensor according to an embodiment of the present invention, where the first pressure sensor 41 includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, a first end of a first resistor R1 in the first pressure sensor 41 and a first end of a fourth resistor R4 in the first pressure sensor 41 are electrically connected to form a first power signal input terminal D1, a second end of the first resistor R1 in the first pressure sensor 41 and a first end of a second resistor R2 in the first pressure sensor 41 are electrically connected to form a first sensing signal measurement connection terminal S1, a second end of a second resistor R2 in the first pressure sensor 41 and a second end of a third resistor R3 in the first pressure sensor 41 are electrically connected to form a second power signal input terminal D2, a first end of a third resistor R829r 3 in the first pressure sensor 41 and a second end of a fourth resistor R4 in the first pressure sensor 41 are electrically connected to form a second power signal input terminal D2 The sensing signal measures connection S2. The second pressure sensor 42 has the same structure as the first pressure sensor 41, the second pressure sensor 42 also includes a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, a first end of the first resistor R1 in the second pressure sensor 42 and a first end of the fourth resistor R4 in the second pressure sensor 42 are electrically connected to form a third power signal input terminal D3, a second end of the first resistor R1 in the second pressure sensor 42 and a first end of the second resistor R2 in the second pressure sensor 42 are electrically connected to form a third sensing signal measurement connection terminal S3, a second end of the second resistor R2 in the second pressure sensor 42 and a second end of the third resistor R3 in the second pressure sensor 42 are electrically connected to form a fourth power signal input terminal D4, a first end of the third resistor R3 of the second pressure sensor 42 and a second end of the fourth resistor R4 of the second pressure sensor 42 are electrically connected to form a fourth sensing signal measurement connection S4. Herein, since the first pressure sensor 41 and the second pressure sensor 42 have the same structure, the structure of the pressure sensor is exemplified by taking the first pressure sensor 41 as an example, specifically, the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 may all have a serpentine shape, and the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 may all be formed by connecting end-to-end portions extending along the second direction X and the third direction Y, where the second direction X intersects the third direction Y. Referring to fig. 9, of the first resistor R1 and the third resistor R3, the length of the portion extending in the second direction X is smaller than the length of the portion extending in the third direction Y; in the second resistor R2 and the fourth resistor R4, the length of the portion extending in the second direction X is greater than the length of the portion extending in the third direction Y. When the display panel is subjected to pressure touch operation, the pressure sensor provided by the embodiment can sense the deformation of the display panel along the second direction X and the deformation of the display panel along the third direction Y, so that the balance of the wheatstone bridge can be damaged to a greater extent, the increase of the signal quantity of the electric signal output by the pressure sensor is facilitated, the analysis and calculation of the pressure of touch are facilitated, and the accuracy of pressure touch is improved.

Fig. 9 shows only one example of the structure of the pressure sensor, and in another embodiment, the pressure sensor is different from the pressure sensor shown in fig. 9 in that: in the first resistor and the third resistor, a length of the extending portion in the second direction may be greater than a length of the extending portion in the third direction; and in the second resistor and the fourth resistor, a length of the portion extending in the second direction may be smaller than a length of the portion extending in the third direction. In yet another embodiment, unlike the pressure sensor shown in fig. 9, there is: in the first resistor, the second resistor, the third resistor, and the fourth resistor, a length of the extending portion in the second direction may be greater than a length of the extending portion in the third direction. In yet another embodiment, unlike the pressure sensor shown in fig. 9, there are: in the first resistor, the second resistor, the third resistor, and the fourth resistor, the length of the extending portion along the second direction may be smaller than the length of the extending portion along the third direction, which is not limited in the present invention.

Alternatively, as shown in fig. 10, fig. 10 is a schematic structural diagram of another first pressure sensor and a second pressure sensor provided in the embodiment of the present invention, as shown in fig. 10, a first pressure sensor 41 includes a first side 411, a second side 412, a third side 413, and a fourth side 414, the first side 411 of the first pressure sensor 41 is opposite to the third side 413 of the first pressure sensor 41, the second side 412 of the first pressure sensor 41 is opposite to the fourth side 414 of the first pressure sensor 41, the first pressure sensor 41 includes a first power signal input end D1 located at the first side 411 thereof and a second power signal input end D2 located at the third side 413 thereof, and a first sensing signal measurement connection end S1 located at the second side 412 thereof and a second sensing signal measurement connection end S2 located at the fourth side 414 thereof. The second pressure sensor 42 has the same configuration as the first pressure sensor 41, the second pressure sensor 42 includes a first side 421, a second side 422, a third side 423, and a fourth side 424, the first side 421 of the second pressure sensor 42 is opposite to the third side 423 of the second pressure sensor 42, the second side 422 of the second pressure sensor 42 is opposite to the fourth side 424 of the second pressure sensor 42, the second pressure sensor 42 includes a third power signal input D3 at the first side 421 thereof and a fourth power signal input D4 at the third side 423 thereof, and a third sensing signal measurement connection S3 at the second side 422 thereof and a fourth sensing signal measurement connection S4 at the fourth side 424 thereof.

Alternatively, as shown in fig. 9, fig. 10 and fig. 11, fig. 11 is a schematic circuit structure diagram of a first pressure sensor and a second pressure sensor provided in the embodiment of the present invention, in the same pressure sensor group, the first power signal input terminal D1 of the first pressure sensor 41 and the third power signal input terminal D3 of the second pressure sensor 42 are electrically connected to the same first power signal line 71; the second power signal input D2 of the first pressure sensor 41 is electrically connected to the same second power signal line 72 as the fourth power signal input D4 of the second pressure sensor 42. The first power supply signal input ends of a plurality of first pressure sensors in the same pressure sensor group (including a first pressure sensor group and a second pressure sensor group) and the third power supply signal input ends of a plurality of second pressure sensors are connected to the same first power supply signal wire, and the second power supply signal input ends of a plurality of first pressure sensors and the fourth power supply signal input ends of a plurality of second pressure sensors in the same pressure sensor group are connected to the same second power supply signal wire. The first power signal input ends of the first pressure sensors in different pressure sensor groups can be connected with the same first power signal line or different first power signal lines; the second power supply signal input ends of the first pressure sensors in different pressure sensor groups can be connected with the same second power supply signal line or different second power supply signal lines; the third power supply signal input ends of the second pressure sensors in different pressure sensor groups can be connected with the same first power supply signal line or different first power supply signal lines; the fourth power signal input terminals of the second pressure sensors in different pressure sensor groups may be connected to the same second power signal line, or may be connected to different second power signal lines, which is not limited in the present invention. As shown in fig. 11, in the technical solution provided in the embodiment of the present invention, only one second power signal line is provided for the first pressure sensor 41 and the second pressure sensor 42 in the same pressure sensor group, so that the advantages of simple wiring, low process difficulty, and low cost are provided.

As shown in fig. 9, 10 and 12, fig. 12 is a schematic diagram of a circuit structure of another first pressure sensor and a second pressure sensor according to an embodiment of the present invention, in which, in a same pressure sensor group (including a first pressure sensor group and a second pressure sensor group), a first power signal input terminal D1 of a first pressure sensor 41 and a third power signal input terminal D3 of a second pressure sensor 42 are electrically connected to a same first power signal line 71; the second power supply signal input terminal D2 of the first pressure sensor 41 is electrically connected to the third power supply signal line 73, and the fourth power supply signal input terminal D4 of the second pressure sensor 42 is electrically connected to the fourth power supply signal line 74, wherein the third power supply signal line 73 is connected to the fourth power supply signal line 74 at the same potential so that the first pressure sensor 41 and the second pressure sensor 42 operate at the same bias voltage, and the first power supply signal line 71 may be connected to a fixed potential different from the voltage on the third power supply signal line 73 and the fourth power supply signal line 74. The first power supply signal input ends of a plurality of first pressure sensors in the same pressure sensor group and the third power supply signal input ends of a plurality of second pressure sensors in the same pressure sensor group are connected to the same first power supply signal line, the second power supply signal input ends of a plurality of first pressure sensors in the same pressure sensor group are connected to the same third power supply signal line, and the fourth power supply signal input ends of a plurality of second pressure sensors in the same pressure sensor group are connected to the same fourth power supply signal line. The first power signal input ends of the first pressure sensors in different pressure sensor groups can be connected with the same first power signal line or different first power signal lines; the second power supply signal input ends of the first pressure sensors in different pressure sensor groups can be connected with the same third power supply signal line, and can also be connected with different third power supply signal lines; the third power supply signal input ends of the second pressure sensors in different pressure sensor groups can be connected with the same first power supply signal line or different first power supply signal lines; the fourth power signal input terminals of the second pressure sensors in different pressure sensor groups may be connected to the same fourth power signal line, or may be connected to different fourth power signal lines, which is not limited in the present invention. Compared with the technical scheme that only one second power signal line is provided for the first pressure sensor 41 and the second pressure sensor 42 in the same pressure sensor group in fig. 11, as shown in fig. 12, when the fourth power signal line 74 is disconnected due to an accident or other reasons, the normally-connected third power signal line 73 can still provide the working voltage for the first pressure sensor, so that the first pressure sensor continues to provide the pressure detection result under a certain error, and the reliability and the service life of the first pressure sensor can be improved. It should be noted that, in the actual process, the circuit structures of the first pressure sensor and the second pressure sensor shown in fig. 11 or fig. 12 may be adopted according to specific product requirements, and the present invention is not limited to this.

Alternatively, as shown in fig. 11 and 12, the first power supply signal line 71 may be grounded in order to provide a stable potential. Specifically, the first sensing signal measurement connection terminal S1 and the second sensing signal measurement connection terminal S2 of the first pressure sensor 41, and the third sensing signal measurement connection terminal S3 and the fourth sensing signal measurement connection terminal S4 of the second pressure sensor 42 may be electrically connected to a signal processor (not shown in the figure), for example, in the first pressure sensor group, the signal processor calculates the output signal value of the first pressure sensor 41 through the voltages of the first sensing signal measurement connection terminal S1 and the second sensing signal measurement connection terminal S2, the signal processor calculates the output signal value (reference signal) of the second pressure sensor 42 through the voltages of the third sensing signal measurement connection terminal S3 and the fourth sensing signal measurement connection terminal S4, in some cases, the output signal of the first pressure sensor 41 may be directly subtracted from the output signal of the second pressure sensor 42, that is, the output signal of the second pressure sensor 42 is used as the reference signal of the first pressure sensor 41 in the same group, and the pressure detection signal value of the first pressure sensor 41 is obtained on the basis of reducing (even eliminating) the influence of the temperature on the first pressure sensor 41 and improving the accuracy of the detection result of the first pressure sensor 41.

Optionally, the display panel may include a liquid crystal display panel, fig. 13 is a schematic structural diagram of the liquid crystal display panel according to an embodiment of the present invention, as shown in fig. 13, the first substrate 10 is an array substrate, the array substrate 10 may include a pixel driving circuit 11 for driving liquid crystal molecules 81 to deflect, a pixel electrode 13, a common electrode 12, and the like, the second substrate 20 is a color filter substrate, the color filter substrate may include a color resistor 21 and a black matrix 22, a liquid crystal layer 80 is clamped between the array substrate and the color filter substrate, and the liquid crystal layer 80 includes a plurality of liquid crystal molecules 81. When a voltage is applied to the common electrode 12 and the pixel electrode 13, the liquid crystal molecules are deflected by the electric field, so as to control the brightness of the light emitted from the backlight (not shown) when the light is emitted through the liquid crystal display panel. The color resistors 21 may include a red color resistor, a green color resistor, and a blue color resistor, where light emitted from the backlight source displays red when passing through the red color resistor, light emitted from the backlight source displays green when passing through the green color resistor, and light emitted from the backlight source displays blue when passing through the blue color resistor, so that the liquid crystal display panel realizes color display.

Optionally, the display panel may include an organic light emitting display panel, fig. 14 is a schematic structural view of the organic light emitting display panel according to an embodiment of the present invention, as shown in fig. 14, the first substrate 10 is an array substrate, the array substrate may include a substrate 14 and organic light emitting structures 15 arranged on the substrate 14 in an array, the second substrate 20 is a protective cover plate, and the substrate 14 and the protective cover plate are bonded and sealed by a frame sealing adhesive 30, specifically, the frame sealing adhesive 30 may include a glass adhesive, and the frame sealing adhesive 30 may be bonded and fixed with the substrate 11 and the protective cover plate by, for example, a laser sintering method. The organic light emitting structure 15 includes a cathode, an anode, and an organic light emitting layer between the cathode and the anode, and the organic light emitting layer may include a light emitting material layer and an auxiliary light emitting layer, and the auxiliary light emitting layer may include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer, and an electron injection layer. Under the action of an applied electric field, electrons and holes are injected from the cathode and the anode into the light emitting material layer in the organic light emitting layer, respectively, to migrate, recombine and decay in the light emitting material layer to emit light. The organic light emitting structure may include a red organic light emitting structure, a green organic light emitting structure, and a blue organic light emitting structure, the light emitting material layer in the red organic light emitting structure may emit red light, the light emitting material layer in the green organic light emitting structure may emit green light, and the light emitting material layer in the blue organic light emitting structure may emit blue light, so that the organic light emitting display panel realizes color display.

Fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 15, a display device 100 according to an embodiment of the present invention includes a display panel 200 according to any embodiment of the present invention, which may be a mobile phone shown in fig. 15, or a computer, a television, an intelligent wearable device, and the like, and this is not particularly limited in the embodiment of the present invention.

An embodiment of the present invention further provides a pressure detection method based on a display panel in each of the above embodiments, where the display panel includes a display area and a non-display area surrounding the display area, and referring to fig. 1 to 5, the display panel includes: a first substrate 10; a second substrate 20 disposed opposite to the first substrate 10; the frame sealing glue 30 is positioned between the first substrate 10 and the second substrate 20, and the frame sealing glue 30 is positioned in the non-display area 102; a pressure sensor 40, the pressure sensor 40 being located on a side of the first substrate 10 facing the second substrate 20; the pressure sensor 40 includes a first pressure sensor 41 and a second pressure sensor 42 with the same structure, the first pressure sensor 41 is located on one side of the frame sealing glue 30 close to the display area 101, and the second pressure sensor 42 is covered by the frame sealing glue 30; at least one first pressure sensor 41 and one second pressure sensor 42 form a first pressure sensor group 401, and in the same first pressure sensor group 401, the output signal of the second pressure sensor 42 is used as the reference signal of the output signal of any one first pressure sensor 41; and/or at least one first pressure sensor 41 and a plurality of second pressure sensors 42 form a second pressure sensor group 402, and in the same second pressure sensor group 402, the average value of the output signals of all the second pressure sensors 42 is used as a reference signal of the output signal of any one first pressure sensor 41;

the pressure detection method comprises the following steps: in the first pressure sensor group, the output signal of the second pressure sensor is used as a first reference signal, and the output signal of the first pressure sensor and the first reference signal are processed to obtain a pressure detection signal value of the first pressure sensor; and/or in the second pressure sensor group, the average value of all the output signals of the second pressure sensors is used as a second reference signal, and the output signal of the first pressure sensor and the second reference signal are processed to obtain the pressure detection signal value of the first pressure sensor.

Assuming that, in the first pressure sensor group or the second pressure sensor group, an error value caused by the temperature in the temperature at the position of the first pressure sensor and the output signal of the first pressure sensor is a first temperature and a first error value, respectively, an error value caused by the temperature in the temperature at the position of the second pressure sensor and the output signal of the second pressure sensor is a second temperature and a second error value, respectively, and since the first pressure sensor and the second pressure sensor have the same structure, the first error value and the first temperature and the second error value and the second temperature have the same first functional relationship.

Illustratively, the display panel includes a first pressure sensor group, an output signal of a second pressure sensor in the first pressure sensor group is only affected by temperature due to being covered by the sealant, an output signal of the second pressure sensor represents an influence of temperature at a position where the second pressure sensor is located on an output signal of the second pressure sensor, wherein, when the first temperature is the same as or very close to the second temperature, an output signal of the first pressure sensor and an output signal of the second pressure sensor are directly subtracted, that is, the output signal of the second pressure sensor is used as a first reference signal of the first pressure sensor in the same group, and a pressure detection signal value of the first pressure sensor is obtained on the basis of reducing (even eliminating) the influence of temperature on the first pressure sensor and improving accuracy of a detection result of the first pressure sensor, when the difference between the first temperature and the second temperature is larger, the functional relationship between the first temperature and the second temperature is assumed to be the second functional relationship, and then after the conversion between the second functional relationship and the first functional relationship, a third functional relationship between the first error value and the second error value can be obtained, and based on the third functional relationship, the output signal of the second pressure sensor is taken as the first reference signal, so that the pressure detection signal value of the first pressure sensor can be obtained on the basis of reducing (even eliminating) the influence of the temperature on the first pressure sensor and improving the accuracy of the detection result of the first pressure sensor.

Illustratively, the second pressure sensor group includes two second pressure sensors having second temperatures T1 and T2, respectively, and second error values F1 and F2 for the two second pressure sensors, respectively, T1 and F1 having a first functional relationship, and T2 and F2 having a first functional relationship. The display panel comprises a second pressure sensor group, the output signal of the second pressure sensor in the second pressure sensor group is only influenced by the temperature because the second pressure sensor is covered by the frame sealing glue, the output signal of the second pressure sensor represents the influence of the temperature at the position of the second pressure sensor on the output signal of the second pressure sensor, wherein when the first temperature is the same as or very close to T1 and T2, the output signal of the first pressure sensor and the average value of F1 and F2, namely (F1+ F2)/2, can be directly subtracted, namely the average value of all the output signals of the second pressure sensors in the second pressure sensor group is used as the second reference signal of the first pressure sensors in the same group, on the basis of reducing (even eliminating) the influence of the temperature on the first pressure sensors and improving the accuracy of the detection result of the first pressure sensors, the pressure detection signal value of the first pressure sensor is obtained, and when the first temperature is different from T1 and T2, assuming that the functional relationship between the first temperature and T1, T2 is a fourth functional relationship, T1, T2 and (F1+ F2)/2 have a fifth functional relationship, a sixth functional relationship between the first error value and (F1+ F2)/2 may be obtained after conversion through the above fourth functional relationship, the fifth functional relationship and the first functional relationship, and based on the sixth functional relation, taking the average value of the output signals of all the second pressure sensors in the second pressure sensor group as the second reference signal, the pressure detection signal value of the first pressure sensor can be obtained on the basis of reducing (even eliminating) the influence of the temperature on the first pressure sensor and improving the accuracy of the detection result of the first pressure sensor.

Alternatively, referring to fig. 1, fig. 2 and fig. 5, in the same first pressure sensor group 401, the size of the first pressure sensor 41 or the second pressure sensor 42 along the first direction is H, the first pressure sensor 41 has a first orthographic projection to the first substrate 10, the second pressure sensor 42 has a second orthographic projection to the first substrate 10, the farthest distance between any point on the first orthographic projection and any point on the second orthographic projection is H, and 2H ≦ 6H, the first direction is the direction in which the first orthographic projection points to the second orthographic projection (i.e. the geometric center of gravity of the first orthographic projection points to the geometric center of gravity of the second orthographic projection), the first pressure sensor 41 and the second pressure sensor 42 may be located on the same layer or on different layers, which the present invention is not limited in this respect. In fig. 1, the pressure sensors 40 (including the first pressure sensor 41 and the second pressure sensor 42 having the same configuration) are arranged in the same layer and are illustrated as a square, a direction in which the center of the square first pressure sensor 41 is directed to the center of the square second pressure sensor 42 is a first direction, and the center of the square refers to an intersection of two diagonal lines of the square. When the farthest distance H between any point on the first orthographic projection and any point on the second orthographic projection satisfies 2H ≦ 6H, the second pressure sensor 42 in the same first pressure sensor group 401 is disposed near the first pressure sensor 41, and the first pressure sensor 41 and the second pressure sensor 42 have similar temperatures, so that the first pressure sensor 41 and the second pressure sensor 42 are affected by the temperatures to a similar extent, the second pressure sensor 42 in the first pressure sensor group 401 is covered by the sealant 30, the output signal of the second pressure sensor 42 is affected by the temperatures only, the output signal of the second pressure sensor 42 represents the influence of the temperature of the second pressure sensor 42 on the output signal of the second pressure sensor 42, because the first pressure sensor 41 and the second pressure sensor 42 have the same structure, the first pressure sensor 41 and the second pressure sensor 42 are affected by the temperatures to the same or similar extent, the output signal of the first pressure sensor 41 can be directly subtracted from the output signal of the second pressure sensor 42, that is, the first reference signal, so as to obtain the pressure detection signal value of the first pressure sensor 41 on the basis of reducing (even eliminating) the influence of the temperature on the first pressure sensor 41 and improving the accuracy of the detection result of the first pressure sensor 41.

Alternatively, referring to fig. 3, 4 and 5, the display panel includes a second pressure sensor group 402, the second pressure sensors 42 in the second pressure sensor group 402 are covered by the sealant 30, the output signal of which is affected only by the temperature, the output signal of the second pressure sensor 42 represents both the effect of the temperature at the location of the second pressure sensor 42 on the output signal of the second pressure sensor 42, although the temperatures at the respective positions in the display panel are different, the temperature difference is not large, the average value of the output signal of the first pressure sensor 41 and the output signals of the plurality of second pressure sensors 42 may be set, that is, the value of the pressure detection signal of the first pressure sensor 41 is obtained by directly subtracting the second reference signal, and the adverse effect of the temperature on the first pressure sensor 41 can also be reduced to a certain extent, so that the accuracy of the detection result of the first pressure sensor 41 is improved.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel including a display area and a non-display area surrounding the display area, the display panel comprising:

a first substrate;

a second substrate disposed opposite to the first substrate;

the step of using the output signal of the second pressure sensor as the reference signal of the output signal of any one of the first pressure sensors specifically includes:

when the difference value between the first temperature and the second temperature is larger than a threshold value, acquiring a second functional relation according to the first temperature and the second temperature;

acquiring a first functional relation; the first function relationship is a function relationship between a first error value and the first temperature and a function relationship between a second error value and the second temperature;

obtaining a third functional relation between the first error value and the second error value according to the first functional relation and the second functional relation;

acquiring a pressure detection signal value of the first pressure sensor according to the third functional relation and an output signal of the second pressure sensor;

wherein, the temperature of the first pressure sensor and the error value brought by the temperature in the output signal of the first pressure sensor are the first temperature and the first error value respectively; the temperature of the second pressure sensor and the error value caused by the temperature in the output signal of the second pressure sensor are the second temperature and the second error value respectively.

2. The display panel according to claim 1, wherein in the same first pressure sensor group, a dimension of the first pressure sensor or the second pressure sensor along a first direction is H, the first pressure sensor has a first orthographic projection to the first substrate, the second pressure sensor has a second orthographic projection to the first substrate, a farthest distance between any point on the first orthographic projection and any point on the second orthographic projection is H, H is greater than or equal to 2H and is less than or equal to 6H, and the first direction is a direction in which the first orthographic projection points to the second orthographic projection.

3. The display panel according to claim 1 or 2, wherein the first pressure sensor and the second pressure sensor are provided in the same layer.

4. A display panel as claimed in claim 1 or 2 characterized in that each of the first pressure sensor groups comprises only one of the first pressure sensors.

5. The display panel according to claim 3, wherein each of the first pressure sensor groups comprises a plurality of the first pressure sensors, and a distance between each of the first pressure sensors and the second pressure sensor is equal in the same first pressure sensor group.

6. The display panel of claim 2, wherein h is 50 μm ≦ h ≦ 120 μm.

7. The display panel of claim 1, wherein the display panel comprises a first corner, a second corner, a third corner, and a fourth corner, wherein a first side of the display panel is between the first corner and the second corner, a second side of the display panel is between the second corner and the third corner, a third side of the display panel is between the third corner and the fourth corner, and a fourth side of the display panel is between the fourth corner and the first corner;

the second pressure sensor group comprises a plurality of first pressure sensors and four second pressure sensors, the first pressure sensors are respectively located on any one or more of the first edge, the second edge, the third edge and the fourth edge of the display panel, and the four second pressure sensors are respectively located at the first corner, the second corner, the third corner and the fourth corner and are different from each other.

8. The display panel of claim 1, wherein the display panel comprises a first edge, a second edge, a third edge, and a fourth edge, wherein the first edge has a length greater than the second edge and the fourth edge, wherein the third edge has a length greater than the second edge and the fourth edge, and wherein the first pressure sensor group is located on any one or more of the first edge, the second edge, the third edge, and the fourth edge.

9. The display panel of claim 1, wherein the first pressure sensor comprises a first resistor, a second resistor, a third resistor, and a fourth resistor, a first end of a first resistor in the first pressure sensor and a first end of a fourth resistor in the first pressure sensor are electrically connected to form a first power signal input end, the second end of the first resistor in the first pressure sensor and the first end of the second resistor in the first pressure sensor are electrically connected to form a first sensing signal measuring connection end, a second end of the second resistor in the first pressure sensor and a second end of the third resistor in the first pressure sensor are electrically connected to form a second power signal input end, a first end of a third resistor in the first pressure sensor and a second end of a fourth resistor in the first pressure sensor are electrically connected to form a second sensing signal measuring connection end;

the second pressure sensor comprises a first resistor, a second resistor, a third resistor and a fourth resistor, wherein a first end of the first resistor in the second pressure sensor and a first end of the fourth resistor in the second pressure sensor are electrically connected to form a third power signal input end, a second end of the first resistor in the second pressure sensor and a first end of the second resistor in the second pressure sensor are electrically connected to form a third sensing signal measuring connection end, a second end of the second resistor in the second pressure sensor and a second end of the third resistor in the second pressure sensor are electrically connected to form a fourth power signal input end, and a first end of the third resistor in the second pressure sensor and a second end of the fourth resistor in the second pressure sensor are electrically connected to form a fourth sensing signal measuring connection end.

10. The display panel according to claim 1,

the first pressure sensor comprises a first edge, a second edge, a third edge and a fourth edge, wherein the first edge of the first pressure sensor is opposite to the third edge of the first pressure sensor, the second edge of the first pressure sensor is opposite to the fourth edge of the first pressure sensor, the first pressure sensor comprises a first power supply signal input end positioned on the first edge of the first pressure sensor, a second power supply signal input end positioned on the third edge of the first pressure sensor, a first induction signal measuring connecting end positioned on the second edge of the first pressure sensor and a second induction signal measuring connecting end positioned on the fourth edge of the first pressure sensor;

the second pressure sensor comprises a first edge, a second edge, a third edge and a fourth edge, the first edge of the second pressure sensor is opposite to the third edge of the second pressure sensor, the second edge of the second pressure sensor is opposite to the fourth edge of the second pressure sensor, the second pressure sensor comprises a third power supply signal input end positioned on the first edge of the second pressure sensor and a fourth power supply signal input end positioned on the third edge of the second pressure sensor, and a third induction signal measurement connecting end positioned on the second edge of the second pressure sensor and a fourth induction signal measurement connecting end positioned on the fourth edge of the second pressure sensor.

11. The display panel according to claim 9 or 10, wherein, in the same pressure sensor group,

the first power signal input of the first pressure sensor and the third power signal input of the second pressure sensor are electrically connected to the same first power signal line;

the second power signal input of the first pressure sensor and the fourth power signal input of the second pressure sensor are electrically connected to the same second power signal line; or,

the second power supply signal input end of the first pressure sensor is electrically connected with a third power supply signal wire, the fourth power supply signal input end of the second pressure sensor is electrically connected with a fourth power supply signal wire, and the third power supply signal wire and the fourth power supply signal wire are connected with the same potential.

12. The display panel according to claim 11, wherein the first power supply signal line is grounded.

13. The display panel according to claim 1, wherein the display panel comprises a liquid crystal display panel, and the second substrate is a color film substrate; or,

the display panel comprises an organic light-emitting display panel, and the second substrate is a protective cover plate.

14. A display device characterized by comprising the display panel according to any one of claims 1 to 13.

15. A pressure detection method of a display panel including a display area and a non-display area surrounding the display area, the display panel comprising:

a first substrate;

a second substrate disposed opposite to the first substrate;

the pressure detection method comprises the following steps:

in the second pressure sensor group, taking an average value of output signals of all the second pressure sensors as a second reference signal, and processing the output signal of the first pressure sensor and the second reference signal to obtain a pressure detection signal value of the first pressure sensor;

the output signal of the second pressure sensor as the first reference signal specifically includes:

16. The pressure detection method according to claim 15, wherein in the same first pressure sensor group, the size of the first pressure sensor or the second pressure sensor along the first direction is H, the first pressure sensor has a first orthographic projection to the first substrate, the second pressure sensor has a second orthographic projection to the first substrate, the farthest distance between any point on the first orthographic projection and any point on the second orthographic projection is H, and H is greater than or equal to 2H and less than or equal to 6H, and the first direction is the direction in which the first orthographic projection points to the second orthographic projection;

in the first pressure sensor group, a difference value between the output signal of the first pressure sensor and the first reference signal is used as a pressure detection signal value of the first pressure sensor.

17. The pressure detection method according to claim 15, characterized in that in the second pressure sensor group, a difference value of the output signal of the first pressure sensor and the second reference signal is taken as a pressure detection signal value of the first pressure sensor.